Cool insights for a hot world: trees and forests recycle water

Anyone who has walked outside on a sunny day knows that forests and trees matter for temperature, humidity and wind speed. Planting trees speaks to concerns about climate change, but the directly important aspects of the tree-climate relationships have so far been overlooked in climate policy where it relates to forest.

That, at least, is the conclusion of a new review. The authors suggest that the global conversation on trees, forests and climate needs to be turned on its head: the direct effects via rainfall and cooling may be more important than the well-studied effects through the global carbon balance.

Yet, current climate policy only recognizes the latter. While farmers understand that trees cool their homes, livestock and crops, they had to learn the complex and abstract language of greenhouse gasses and carbon stocks if they wanted to be part of climate mitigation efforts. Not anymore, if the new perspectives become widely accepted.Read more

What will it take to restore 100 million hectares of land in Africa?

The challenge is massive, but so is the promise. Healing 100 million hectares of degraded and deforested land in Africa will bring countless benefits: fresh air and water, food and energy —the very stuff of survival. It will also build people’s climate resilience, and contribute in a big way to global climate change mitigation goals.

Land restoration aims to bring back ecological functionality to degraded ecosystems. It can be achieved by introducing or allowing trees to grow on landscapes and using sustainable land management techniques such as terracing steep hillsides, minimizing tillage and building structures to stop soil erosion. Curbing free-grazing of livestock and managing water also support land restoration. Read more. . .

Soil inhabitants hold together the planet’s food system

At the launch of the Global Soil Biodiversity Atlas, experts shone a spotlight on the astonishing biodiversity in the soil, which supports food production, clean water, human health, and environmental sustainability.

The Global Soil Biodiversity Atlas— the outstanding reward of a 3-year global collaboration—was launched on 25 May 2016 in Nairobi. The launch, part of a symposium of the Second United Nations Environment Assembly, provided an opportunity for eminent speakers in the field to discuss the central role soil biodiversity plays in food security, environmental health, and the global sustainable development agenda. Read more…

Success factors for land and water management in Africa

At present, large expanses of land in rural Africa are degraded as a result of over extraction of trees for timber, firewood and charcoal. The problem is exacerbated by poor crop and animal husbandry practices, such as growing crops in unsuitable ecological zones and on steep slopes, as well as unplanned grazing on Africa’s vast rangelands. Soils in degraded landscapes erode and lose their biodiversity and fertility, and the hydrologic functions of surrounding watersheds are diminished, leading to loss of water quantity and quality; land and water management, after all, are two sides of the same coin.

Immaculée Nyirahabimana is a farmer from Cyuve district-CIAT
Immaculée Nyirahabimana is a farmer from Cyuve district-CIAT. Photo by Stephanie Malyon / CIAT. www.ciatnews.cgiar.org/?p=7981

A side event convened by the CGIAR Research Program on Water, Land and Ecosystems (WLE) at the seventh Africa Agriculture Science Week (AASW7) sought to share knowledge on how to better manage the continent’s water and land resources, as a means to support higher and more sustainable agricultural productivity and better livelihoods for people. The session contributed recommendations to the just-ended conference convened in Kigali by the Forum for Agricultural Research in Africa, FARA, the apex continental organization responsible for coordinating and advocating for agricultural research-for-development. Read more. . .

The A to Z of soil biodiversity

The soil is the “living, breathing skin of our planet.” It is the basis of food production and essential for clean water, health, greenhouse gas capture and numerous other functions that support life on earth.

Soil biodiversity is intimately connected with all terrestrial life. Thanks to advances in technology and global scientific cooperation, huge strides have been made in our understanding of the dazzling diversity of life forms beneath our feet; and especially that of microscopic bacteria, fungi, and nematodes that are invisible to the naked eye. Read more…

For more and better-quality food production, take care of pollinators

The evidence is clear: For big gains in crop production, our landscapes must become more hospitable to some of the planet’s littlest creatures— its pollinators.

bee-coffee
Coffee pollination by carpenter bee (Xylocopa sp.). Photo by Dino Martins

Bees, birds, butterflies, moths and some small mammals transfer pollen from flower to flower, causing fruit to set. This environmental service of pollinators is what secures the harvest of a huge proportion of the world’s food production.

At an invited talk at the Nairobi headquarters of the World Agroforestry Centre (ICRAF) on 8 January 2016, Kenyan naturalist and entomologist Dino Martins, the Executive Director of the Mpala Research Centre and Chair of the Insect Committee of Nature Kenya, delved into the intimate links between the world’s food security and pollination. Read more. ..

Immense benefits from agroforestry in rural Cameroon

Yaounde — Commercial agriculture has received a major boost and the impact of climate change minimised in Cameroon thanks to the adoption of agroforestry techniques by thousands of farmers.

Seedlings of traditionally important food trees in Louis-Marie Atangana’s home nursery in Nkenlikok, Cameroon. Photo by Daisy Ouya/ICRAF
Seedlings of traditionally important food trees in Louis-Marie Atangana’s home nursery in Nkenlikok, Cameroon. Photo by Daisy Ouya/ICRAF

The World Agroforestry Centre introduced agroforestry methods to rural farmers in the central African country some 20 years ago.

Also known as agro-sylviculture, it a land use management system in which trees or shrubs are grown around or among crops or pastureland. These techniques aim to ensure smallholder households increase their use of trees in agricultural landscapes to improve food security, nutrition, income, health, shelter, social cohesion, energy resources and environmental sustainability. Read more. .

With trees on farms, climate-change mitigation is a co-benefit of broader socioeconomic gains

In a ‘Letter to the Editor’ published in the Guardian Development Blog, Professor Roger Leakey urges a closer look at agroforestry’s potential as a pathway for both mitigating climate change and fighting hunger, malnutrition and poverty.

Part of ICRAF's tree domestication and experimentation nursery in Yaoundé, Cameroon. Photo by Daisy Ouya/ICRAF
Part of ICRAF’s tree domestication and experimentation nursery in Yaoundé, Cameroon. Photo by Daisy Ouya/ICRAF

Leakey, who serves as the vice-chair of the International Tree Foundation, outlines a three-step action plan that involves:

  1. Using simple biological approaches to rehabilitate degraded farm land and improve crop yields;
  2. Planting local, highly favoured, traditionally important food trees to reduce hunger and malnutrition; and
  3. Setting up new cottage industries to process and add value to these products, creating business and job opportunities to further improve household livelihoods. Read more. . .

Private companies partner with small producers to create sustainable supply chains of the future

Leveraging their buying power and financial resources, companies are working to create the sustainable supply chains we need in a changing climate. Ones in which farmers and companies prosper together. Where farmers will produce more using ecologically sound practices, and earn decent incomes for their production.

An estimated half a billion smallholder farmers produce 70% of the world’s raw materials and are the pillar of the food industry. Their sustainability is tied together with that of the companies—large and small— that buy this produce, process and market foods and natural products. Read more. . .

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